When a ThreadSafeFunction instance is created from napi_threadsafe_function, its BlockingCall method doesn't work properly:

• The passed callback is ignored, but still required by the method signature (the one supplied with napi_create_threadsafe_function is used)
• The passed data pointer is incorrect for some reason. napi_call_threadsafe_function works fine.

I'm doing this because I want to napi_unref_threadsafe_function without using all the verbose C APIs.